GREY AND BLACK TREK ALPHA 4500 23 SPEED FRONT SUSPENSION MOUNTAIN BIKE WITH DISK BRAKES
TREK 4500 ALPHA 17.5 inch frame 26 inch tires 24 speed mountain bike BONTRAGER SHIMANO for Sale in Ramona, CA - OfferUp
Hi! I have for a long time this early 2000's Trek Alpha 4500 and I want to do an upgrade project on this bike, what things do you recommend me to upgrade